diff --git a/.gitignore b/.gitignore
index dfa2c12..da1b21a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -320,7 +320,7 @@ GitHub.sublime-settings
 
 ### VisualStudioCode ###
 .vscode/*
-!.vscode/settings.json
+.vscode/settings.json
 !.vscode/tasks.json
 !.vscode/launch.json
 !.vscode/extensions.json
diff --git a/src/inc/abuse-decisions-actions.php b/src/inc/abuse-decisions-actions.php
new file mode 100644
index 0000000..bb8fb26
--- /dev/null
+++ b/src/inc/abuse-decisions-actions.php
@@ -0,0 +1,190 @@
+<?php
+
+namespace WPCOMSpecialProjects\SiftDecisions\Abuse_Decision_Actions;
+
+/**
+ * Unblock a user from making purchases if Sift indicates that they are no longer a fraud risk.
+ *
+ * @param integer $user_id The ID of the user to unblock from making purchases.
+ *
+ * @return void
+ */
+function unblock_user_from_purchases( $user_id ) {
+	delete_user_meta( $user_id, 'is_blocked_from_purchases' );
+}
+
+/**
+ * Void and refund all orders for a user.
+ *
+ * @param integer $user_id The ID of the user to void and refund orders for.
+ *
+ * @return void
+ */
+function void_and_refund_user_orders( $user_id ) {
+	$orders = wc_get_orders(
+		array(
+			'customer' => $user_id,
+			'status'   => array( 'completed', 'processing' ),
+		)
+	);
+
+	foreach ( $orders as $order ) {
+		sift_fraud_void_refund_order( $order->get_id() );
+	}
+}
+
+/**
+ * Cancel all subscriptions for a user.
+ *
+ * @param integer $user_id The ID of the user to cancel subscriptions for.
+ *
+ * @return void
+ */
+function cancel_and_remove_user_subscriptions( $user_id ) {
+	$subscriptions = wcs_get_users_subscriptions( $user_id );
+
+	foreach ( $subscriptions as $subscription ) {
+		if ( 'active' === $subscription->get_status() || 'pending-cancel' === $subscription->get_status() ) {
+			$subscription->update_status( 'cancelled', __( 'Cancelled by system due to account block. SGDC Error OYBPXRQ', 'sift-decisions' ) );
+			wp_delete_post( $subscription->get_id(), true );
+		}
+	}
+}
+
+/**
+ * Remove licenses and product keys associated with a user.
+ *
+ * @param integer $user_id The ID of the user to remove licenses and product keys for.
+ *
+ * @return void
+ */
+function remove_user_licenses_and_product_keys( $user_id ) {
+	delete_user_meta( $user_id, 'user_licenses' );
+	delete_user_meta( $user_id, 'user_product_keys' );
+
+	$args = array(
+		'post_type'   => array( 'license', 'product_key' ),
+		'meta_key'    => 'user_id',
+		'meta_value'  => $user_id,
+		'post_status' => 'any',
+	);
+
+	$posts = get_posts( $args );
+	foreach ( $posts as $post ) {
+		wp_delete_post( $post->ID, true );
+	}
+}
+
+/**
+ * Display the SGDC error to the user.
+ *
+ * @param string $message Override the default message to display to the user.
+ *
+ * @return void
+ */
+function display_sgdc_error( $message = '' ) {
+	$default_message = __( 'Your account has been blocked from making purchases. SGDC Error OYBPXRQ', 'sift-decisions' );
+	$message         = $message ? $message : $default_message;
+	wc_add_notice( $message, 'error' );
+}
+
+/**
+ * Force user logout when they are blocked from making purchases.
+ *
+ * @param integer $user_id The ID of the user to log out.
+ *
+ * @return void
+ */
+function force_user_logout( $user_id ) {
+	if ( class_exists( 'WP_Session_Tokens' ) ) {
+		$user_sessions = WP_Session_Tokens::get_instance( $user_id );
+		$user_sessions->destroy_all();
+	}
+
+	if ( get_current_user_id() === $user_id ) {
+		wp_logout();
+	}
+}
+
+/**
+ * To void/cancel/refund an order...
+ *
+ * Loosely based on https://www.ibenic.com/how-to-create-woocommerce-refunds-programmatically/ -- but needs review.
+ *
+ * @param mixed $order_id Post object or post ID of the order.
+ *
+ * @return \WC_Order_Refund|\WP_Error
+ */
+function sift_fraud_void_refund_order( $order_id ) {
+	$order = wc_get_order( $order_id );
+
+	if ( ! is_a( $order, 'WC_Order' ) ) {
+		return new \WP_Error(
+			'wc-order',
+			__( 'Provided ID is not a WC Order', 'sift-decisions' )
+		);
+	}
+
+	if ( 'refunded' === $order->get_status() ) {
+		return new \WP_Error(
+			'wc-order',
+			__( 'Order has been already refunded', 'sift-decisions' )
+		);
+	}
+
+	$order_items = $order->get_items( array( 'line_item', 'fee', 'shipping' ) );
+
+	$refund_amount = 0;
+	$line_items    = array();
+
+	if ( ! $order_items ) {
+		return new \WP_Error(
+			'wc-order',
+			__( 'This order has no items', 'sift-decisions' )
+		);
+	}
+
+	foreach ( $order_items as $item_id => $item ) {
+		$line_total = $order->get_line_total( $item, false, false );
+		$qty        = $item->get_quantity();
+		$tax_data   = wc_get_order_item_meta( $item_id, '_line_tax_data' );
+
+		$refund_tax = array();
+
+		// Check if it's shipping costs. If so, get shipping taxes.
+		if ( $item instanceof \WC_Order_Item_Shipping ) {
+			$tax_data = wc_get_order_item_meta( $item_id, 'taxes' );
+		}
+
+		// If taxdata is set, format as decimal.
+		if ( ! empty( $tax_data['total'] ) ) {
+			$refund_tax = array_filter( array_map( 'wc_format_decimal', $tax_data['total'] ) );
+		}
+
+		// Calculate line total, including tax.
+		$line_total_inc_tax = wc_format_decimal( $line_total ) + ( is_numeric( reset( $refund_tax ) ) ? wc_format_decimal( reset( $refund_tax ) ) : 0 );
+
+		// Add the total for this line to the grand total.
+		$refund_amount += round( $line_total_inc_tax, 2 );
+
+		// Fill item per line.
+		$line_items[ $item_id ] = array(
+			'qty'          => $qty,
+			'refund_total' => wc_format_decimal( $line_total ),
+			'refund_tax'   => array_map( 'wc_round_tax_total', $refund_tax ),
+		);
+	}
+
+	$refund = wc_create_refund(
+		array(
+			'amount'         => $refund_amount,
+			'reason'         => 'Sift Fraud Detection - Voiding Order',
+			'order_id'       => $order->ID,
+			'line_items'     => $line_items,
+			'refund_payment' => true,
+			'restock_items'  => true,
+		)
+	);
+
+	return $refund;
+}
diff --git a/src/inc/abuse-decisions.php b/src/inc/abuse-decisions.php
new file mode 100644
index 0000000..7ba9b53
--- /dev/null
+++ b/src/inc/abuse-decisions.php
@@ -0,0 +1,151 @@
+<?php
+
+namespace WPCOMSpecialProjects\SiftDecisions\Abuse_Decisions;
+
+use function WPCOMSpecialProjects\SiftDecisions\Abuse_Decision_Actions\{
+	unblock_user_from_purchases,
+	void_and_refund_user_orders,
+	cancel_and_remove_user_subscriptions,
+	remove_user_licenses_and_product_keys,
+	display_sgdc_error,
+	force_user_logout
+};
+
+/**
+ * Process the Sift decision received.
+ *
+ * @param mixed   $return_value The return value.
+ * @param string  $decision_id  The ID of the Sift decision.
+ * @param integer $entity_id    The ID of the entity the decision is for.
+ *
+ * @return mixed
+ */
+function process_sift_decision_received( $return_value, $decision_id, $entity_id ) {
+
+	switch ( $decision_id ) {
+		case 'trust_list_payment_abuse':
+			handle_trust_list_payment_abuse( $entity_id );
+			break;
+
+		case 'looks_good_payment_abuse':
+			handle_looks_good_payment_abuse( $entity_id );
+			break;
+
+		case 'not_likely_fraud_payment_abuse':
+			handle_not_likely_fraud_payment_abuse( $entity_id );
+			break;
+
+		case 'likely_fraud_refundno_renew_payment_abuse':
+			handle_likely_fraud_refundno_renew_payment_abuse( $entity_id );
+			break;
+
+		case 'likely_fraud_keep_purchases_payment_abuse':
+			handle_likely_fraud_keep_purchases_payment_abuse( $entity_id );
+			break;
+
+		case 'fraud_payment_abuse':
+			handle_fraud_payment_abuse( $entity_id );
+			break;
+
+		case 'block_wo_review_payment_abuse':
+			handle_block_wo_review_payment_abuse( $entity_id );
+			break;
+
+		case 'looks_ok_payment_abuse':
+		case 'looks_suspicious_payment_abuse':
+		case 'order_looks_ok_payment_abuse':
+		case 'order_looks_suspicious_payment_abuse':
+			// Not Currently Implemented.
+			break;
+	}
+
+	return $return_value;
+}
+add_filter( 'sift_decision_received', __NAMESPACE__ . '\process_sift_decision_received', 10, 5 );
+
+/**
+ * Handle the 'trust_list_payment_abuse' decision.
+ *
+ * @param integer $user_id The ID of the user.
+ *
+ * @return void
+ */
+function handle_trust_list_payment_abuse( $user_id ) {
+	unblock_user_from_purchases( $user_id );
+}
+
+/**
+ * Handle the 'looks_good_payment_abuse' decision.
+ *
+ * @param integer $user_id The ID of the user.
+ *
+ * @return void
+ */
+function handle_looks_good_payment_abuse( $user_id ) {
+	unblock_user_from_purchases( $user_id );
+}
+
+/**
+ * Handle the 'not_likely_fraud_payment_abuse' decision.
+ *
+ * @param integer $user_id The ID of the user.
+ *
+ * @return void
+ */
+function handle_not_likely_fraud_payment_abuse( $user_id ) {
+	unblock_user_from_purchases( $user_id );
+}
+
+/**
+ * Handle the 'likely_fraud_refundno_renew_payment_abuse' decision.
+ *
+ * @param integer $user_id The ID of the user.
+ *
+ * @return void
+ */
+function handle_likely_fraud_refundno_renew_payment_abuse( $user_id ) {
+	update_user_meta( $user_id, 'is_blocked_from_purchases', true );
+	void_and_refund_user_orders( $user_id );
+	cancel_and_remove_user_subscriptions( $user_id );
+	remove_user_licenses_and_product_keys( $user_id );
+	display_sgdc_error( 'You are blocked from making purchases due to a recent fraud review. SGDC Error OYBPXRQ' );
+}
+
+/**
+ * Handle the 'likely_fraud_keep_purchases_payment_abuse' decision.
+ *
+ * @param integer $user_id The ID of the user.
+ *
+ * @return void
+ */
+function handle_likely_fraud_keep_purchases_payment_abuse( $user_id ) {
+	update_user_meta( $user_id, 'is_blocked_from_purchases', true );
+	display_sgdc_error( 'You are blocked from making purchases due to a recent fraud review. SGDC Error OYBPXRQ' );
+}
+
+/**
+ * Handle the 'fraud_payment_abuse' decision.
+ *
+ * @param integer $user_id The ID of the user.
+ *
+ * @return void
+ */
+function handle_fraud_payment_abuse( $user_id ) {
+	update_user_meta( $user_id, 'is_blocked_from_purchases', true );
+	void_and_refund_user_orders( $user_id );
+	cancel_and_remove_user_subscriptions( $user_id );
+	remove_user_licenses_and_product_keys( $user_id );
+	display_sgdc_error( 'You are blocked from making purchases due to fraudulent activity. SGDC Error OYBPXRQ' );
+	force_user_logout( $user_id );
+}
+
+/**
+ * Handle the 'block_wo_review_payment_abuse' decision.
+ *
+ * @param integer $user_id The ID of the user.
+ *
+ * @return void
+ */
+function handle_block_wo_review_payment_abuse( $user_id ) {
+	update_user_meta( $user_id, 'is_blocked_from_purchases', true );
+}